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70 Commits

Author SHA1 Message Date
Raymond Hettinger 4a5cccb02b
bpo-20499: Rounding error in statistics.pvariance (GH-28230) 2021-09-08 22:00:12 -05:00
Raymond Hettinger 793f55bde9
bpo-39218: Improve accuracy of variance calculation (GH-27960) 2021-08-30 20:57:30 -05:00
Raymond Hettinger 3668e118f7
Update nonstandard variable names (GH-26540) 2021-06-04 16:28:31 -07:00
Raymond Hettinger 2f2e703244
bpo-44151: Various grammar, word order, and markup fixes (GH-26344) 2021-05-24 23:04:04 -07:00
Zack Kneupper 2f3a87856c
bpo-44151: linear_regression() minor API improvements (GH-26199) 2021-05-24 17:30:58 -07:00
Raymond Hettinger be4dd7fcd9
bpo-44150: Support optional weights parameter for fmean() (GH-26175) 2021-05-20 20:22:26 -07:00
Raymond Hettinger b3f65e819f
Apply edits from Allen Downey's review of the linear_regression docs. (GH-26176) 2021-05-16 19:21:14 -07:00
Raymond Hettinger fdfea4ab16
Improve speed and accuracy for correlation() (GH-26135) 2021-05-15 11:00:51 -07:00
Raymond Hettinger 55b78ce3c4
Eliminate duplicated calculations and unnecessary work for linear regression (GH-25922) 2021-05-06 07:43:13 -07:00
Raymond Hettinger 1add719516
Fix inconsistent fsum vs sum and fmean vs mean (GH-25898) 2021-05-04 11:27:28 -07:00
Tymoteusz Wołodźko 09aa6f914d
bpo-38490: statistics: Add covariance, Pearson's correlation, and simple linear regression (#16813) 
Co-authored-by: Tymoteusz Wołodźko <twolodzko+gitkraken@gmail.com
 2021-04-25 14:45:09 +03:00
Raymond Hettinger 30a8b28396
bpo-43147: Remove archaic terminology. (GH-24462) 2021-02-07 16:44:42 -08:00
Raymond Hettinger cc3467a57b
bpo-38308: Add optional weighting to statistics.harmonic_mean() (GH-23914) 2020-12-23 19:52:09 -08:00
Raymond Hettinger 5aad027db9
Some reformatting (suggested by Black) and minor factoring. (GH-20865) 2020-06-13 19:17:28 -07:00
Raymond Hettinger d71ab4f738
bpo-40855: Fix ignored mu and xbar parameters (GH-20835) 2020-06-13 15:55:52 -07:00
Raymond Hettinger 0400a7f2f8
Minor code cleanups for statistics (GH-19873) 
* Minor cleanups:  Removed unused code.  Move C import near its Python version.

* Clean-up whitespace
 2020-05-02 19:30:24 -07:00
Raymond Hettinger 70f027dd22
bpo-40290: Add zscore() to statistics.NormalDist. (GH-19547) 2020-04-16 10:25:14 -07:00
Raymond Hettinger 733b9a308e
bpo-38385: Fix iterator/iterable terminology in statistics docs (GH-17111) 2019-11-11 23:35:06 -08:00
Raymond Hettinger 5eabec022b
bpo-38521: Fix error in NormalDist.__eq__() (GH-16840) 2019-10-18 14:20:35 -07:00
Raymond Hettinger 7ce4bfa8cf
Minor code and comment cleanup (GH-16315) 2019-09-20 21:46:52 -07:00
Raymond Hettinger 272d0d017a
bpo-36546: No longer a need to make "data" positional only (GH-16252) 2019-09-17 20:45:05 -07:00
Raymond Hettinger 4db25d5c39
bpo-36018: Address more reviewer feedback (GH-15733) 2019-09-08 16:57:58 -07:00
Raymond Hettinger e4810b2a6c
bpo-36324: Apply review comments from Allen Downey (GH-15693) 2019-09-05 00:18:47 -07:00
Dong-hee Na 0a18ee4be7 bpo-37798: Add C fastpath for statistics.NormalDist.inv_cdf() (GH-15266) 2019-08-23 15:20:30 -07:00
Raymond Hettinger 8183bb8150
bpo-36324: Update comments to include the target hash sums (GH-15110) 2019-08-04 11:52:04 -07:00
Raymond Hettinger 1c0e9bb94b
Minor whitespace, indentation, and quoting changes to improve internal consistency and appease linters (GH-14888) 2019-07-21 12:13:07 -07:00
Raymond Hettinger 02c91f59b6
bpo-36324: Make internal attributes for statistics.NormalDist() private. (GH-14871) 
* Make internals private

* Finish making mu and sigma private

* Add missing __hash__() method

* Add blurb
 2019-07-21 00:34:47 -07:00
Raymond Hettinger eed5e9a956
bpo-36546: Clean-up comments (GH-14857) 2019-07-19 01:57:22 -07:00
Raymond Hettinger 1791128677
bpo-36546: Mark first argument as position only (GH-14363) 2019-06-25 04:39:22 +02:00
Raymond Hettinger 6c01ebcc0d
bpo-37158: Simplify and speed-up statistics.fmean() (GH-13832) 2019-06-05 07:39:38 -07:00
Raymond Hettinger cba9f84725
bpo-36546: Add design notes to aid future discussions (GH-13769) 2019-06-02 21:07:43 -07:00
Raymond Hettinger fb8c7d5332
bpo-36018: Make "seed" into a keyword only argument (GH-12921) 2019-04-23 01:46:18 -07:00
Raymond Hettinger 7280048690
bpo-35904: Add missing fmean() entry to the summary table (GH-12919) 2019-04-23 01:35:16 -07:00
Raymond Hettinger 9013ccf6d8
bpo-36546: Add statistics.quantiles() (#12710) 2019-04-23 00:06:35 -07:00
Raymond Hettinger 6463ba3061
bpo-27181: Add statistics.geometric_mean() (GH-12638) 2019-04-07 09:20:03 -07:00
Raymond Hettinger d1e768a677
bpo-36326: Let inspect.getdoc() find docstrings for __slots__ (GH-12498) 2019-03-25 13:01:13 -07:00
Raymond Hettinger fe13883f01 bpo-36324: Improved code formatting for the NormalDist.inv_cdf rational approximation (GH-12448) 
https://bugs.python.org/issue36324
 2019-03-19 14:29:13 -07:00
Raymond Hettinger 52a594bd0d NormalDist.inv_cdf(): In-line constants because the variable names were not informative (GH-12446) 2019-03-19 12:48:04 -07:00
Raymond Hettinger 5f1e8b4d24 Add docstrings to the arithmetic methods in NormalDist() (GH-12426) 2019-03-18 22:24:15 -07:00
Raymond Hettinger 714c60d7ac
bpo-36324: Add inv_cdf() to statistics.NormalDist() (GH-12377) 2019-03-18 20:17:14 -07:00
Raymond Hettinger 41f0b78cbf Simplify overlap() formula for case where variances are equal (GH-12323) 2019-03-14 02:25:26 -07:00
Raymond Hettinger fc06a192fd
bpo-35892: Fix mode() and add multimode() (#12089) 2019-03-12 00:43:27 -07:00
Raymond Hettinger 318d537daa
bpo-36169 : Add overlap() method to statistics.NormalDist (GH-12149) 2019-03-06 22:59:40 -08:00
Raymond Hettinger ef17fdbc1c bpo-36018: Add special value tests and make minor tweaks to the docs (GH-12096) 
https://bugs.python.org/issue36018
 2019-02-28 09:16:25 -08:00
Raymond Hettinger 9e456bc70e bpo-36018: Add properties for mean and stdev (GH-12022) 
Responding to suggestions on the tracker and some off-line suggestions.

Davin suggested that english named accessors instead of greek letters would result in more intelligible user code. Steven suggested that the parameters still need to be *mu* and *theta* which are used elsewhere (and I noted those parameter names are used in linked-to resources). 

Michael suggested proving-out the API by seeing whether it generalized to *Lognormal*.  I did so and found that Lognormal distribution parameters *mu* and *sigma*  do not represent the mean and standard deviation of the lognormal distribution (instead, they are for the underlying regular normal distribution).

Putting these ideas together, we have NormalDist parameterized by *mu* and *sigma* but offering English named properties for accessors.  That gives lets us match other API that access mu and sigma, it matches the external resources on the topic, gives us clear english names in user code. The API extends nicely to LogNormal where the parameters and the summary statistic accessors are not the same.


https://bugs.python.org/issue36018
 2019-02-24 11:44:55 -08:00
Raymond Hettinger 79fbcc597d bpo-36018: Make __pos__ return a distinct instance of NormDist (GH-12009) 
https://bugs.python.org/issue36018
 2019-02-23 22:19:01 -08:00
Raymond Hettinger 11c7953165
bpo-36018: Add the NormalDist class to the statistics module (GH-11973) 2019-02-23 14:44:07 -08:00
Raymond Hettinger 47d9987247
bpo-35904: Add statistics.fmean() (GH-11892) 2019-02-21 15:06:29 -08:00
Victor Stinner d6debb24e0 bpo-29919: Remove unused imports found by pyflakes (#137) 
Make also minor PEP8 coding style fixes on modified imports.
 2017-03-27 16:05:26 +02:00
Steven D'Aprano fb315dbe82 Issue #27181 remove geometric_mean and defer for 3.7. 2016-10-05 03:24:45 +11:00